Global Patent Index - EP 0977686 A1

EP 0977686 A1 2000-02-09 - SATELLITE INCLINATION CHANGES USING WEAK STABILITY BOUNDARIES

Title (en)

SATELLITE INCLINATION CHANGES USING WEAK STABILITY BOUNDARIES

Title (de)

SATELLITENBAHNNEIGUNGSÄNDERUNGEN BEI GEBRAUCH VON SCHWACHEN STABILITÄTSGRENZEN

Title (fr)

CHANGEMENTS D'INCLINAISON DE SATELLITE A L'AIDE DE LIMITES DE STABILITE FAIBLES

Publication

EP 0977686 A1 (EN)

Application

EP 98922051 A

Priority

  • US 9808247 W
  • US 4431897 P
  • US 4824497 P
  • US 9801924 W
  • US 9805784 W

Abstract (en)

[origin: WO9847765A1] This system provides a fuel efficient way to change the inclination of an orbiting satellite. This is done by an indirect route by first doing a maneuver to bring the satellite to the moon on a BCT (Ballistic Capture Transfer). At the moon, the satellite is in the fuzzy boundary or weak stability boundary. A negligibly small maneuver can then bring it back to the Earth on a reverse BCT to the desired Earth inclination. Another maneuver puts it into the new ellipse at the Earth. Satellites that are launched into a LEO in a circular orbit of an altitude of 700 km with an inclination of 34 DEG , approximately 6 km/s is required to change the inclination to 90 DEG . This method achieves a significant savings and unexpected benefits in energy as measured by Delta-V. Flight time is substantially reduced from the previous method of 170 days to 88 or even 6 days.

IPC 1-7 (main, further and additional classification)

B64G 1/00; B64G 1/24

IPC 8 full level (invention and additional information)

B64G 1/10 (2006.01); B64G 1/00 (2006.01); B64G 1/24 (2006.01); G05D 1/10 (2006.01)

CPC (invention and additional information)

B64G 1/007 (2013.01); B64G 1/242 (2013.01); B64G 2001/247 (2013.01)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9847765 A1 19981029; AU 738202 B2 20010913; AU 7468398 A 19981113; CN 1086988 C 20020703; CN 1261318 A 20000726; EA 002665 B1 20020829; EA 199900900 A1 20000626; EP 0977686 A1 20000209; EP 0977686 A4 20010502; JP 2001518861 A 20011016; JP 2005088891 A 20050407; JP 3665649 B2 20050629; US 2002007233 A1 20020117; US 2003195674 A1 20031016; US 2004176883 A1 20040909; US 6253124 B1 20010626; US 6577930 B2 20030610; US 6751531 B2 20040615; US 6999860 B2 20060214

INPADOC legal status


2008-03-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20071006

2007-04-25 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050512

2006-06-14 [RIN1] INVENTOR (CORRECTION)

- Inventor name: BELBRUNO, EDWARD A.

2006-01-25 [RIN1] INVENTOR (CORRECTION)

- Inventor name: BELBRUNO, EDWARD A.

2005-06-29 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20050512

2001-05-02 [A4] SUPPLEMENTARY SEARCH REPORT

- Effective date: 20010316

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A4

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-04-25 [RIC1] CLASSIFICATION (CORRECTION)

- Free text: 7B 64G 1/00 A, 7B 64G 1/24 B, 7G 05D 1/10 B

2000-02-09 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991110

2000-02-09 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE